JPS58207510A - Method of fixing axial material to tabular material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for fixing a metal shaft-like object such as a shaft, a hinge, a bolt, etc. to a metal plate-like object.

Conventionally, one of the methods for fixing a shaft-shaped object to a plate-shaped object is to form a through hole in the plate-shaped object and press fit the shaft-shaped object into the through hole to fix it.This method has been widely used. There is. However, for example, if the plate-like object is relatively thin and the length of engagement between the shaft-like object and the plate-like object is short compared to the diameter of the eight-shaft object, it is not possible to securely fix the shaft-like object. It was difficult and initially
nili! Even if the shaft-like object is fixed, if excessive force is applied and the fitting part becomes slightly loose, the shaft-like object will easily come off.

For this purpose, serrations are formed at the fitting part of the shaft-like object and cut into the periphery of the through hole to increase the bonding strength between the shaft-like object and the plate-like object. This does not change the fact that the shaft-like object easily comes off when the shaft-like object is loosened. With this background in mind, the present invention has been developed to prevent loosening at the fitting part between the full-length shaft-like object and the plate-like object. The purpose of this invention is to provide a method for firmly fixing a shaft-shaped object so that it is unlikely to occur and will not easily come out or become twisted even if it loosens to some extent. The fixing method is characterized by (1) forming a circular through hole in the metal plate, and (2) forming a circular through hole in the shaft to be fitted into the through hole. (8) forming at least one circumferential annular groove in the large diameter fitting portion;
By press-fitting the +ju fitting into the iJ through hole, the thickness of the periphery of the 61 through hole is reduced to a +fiJ annular groove.

Hereinafter, examples of unexploded IJIj will be explained (1) and 6, taking as an example a case in which a bolt for removing a wheel disk (J) is fixed to an axle hub.

The first step in this embodiment is to prepare the axle hub and bolts. Either of these steps can be performed first, but the through holes 6 should be sufficiently formed by machining or pressing with a press at the positions where the bolts 4 of the JE-shaped axle hub 2 as shown in Fig. 1 are to be fixed. Formed with perfect dimensional accuracy. -1 On the other hand, the bolt 4 has a head 8. Includes a fitting part 10 and a threaded part 12, and a bracket fitting part 1o
has an outer diameter slightly larger than the inner diameter of the through-hole 6, and an annular groove 14 having a cross-sectional shape such as a square shape or a U-shape is formed in the axially intermediate portion thereof. The bolt 4 can be manufactured by plastic forming such as rolling or by machining. In addition, the bolt 4 may be made of a material harder than the material of the hub 2, or the hub 2 may be made of a material with a hardness of 11B2<6.9 or more by heat treatment.
321(7) 8Cr 7 fT: Recommended to manufacture.

Once the hub 2 and bolts 4 have been prepared as described above, the hub 2 is supported by the support 16 as shown in FIG.
The bolt 4 is inserted into the through hole 6 of the hub 2 from the threaded portion 12 side. Subsequently, as shown in FIG. 4, the pushing IE tool 18 having a surface opposite to the upper surface of the head 8 is lowered to push down the head 8, and the fitting portion 10 is inserted into the through hole 6. This operation can be easily performed using ordinary press equipment.

1'JiJ, the outer diameter of the fitting part IQ is slightly larger than the inner diameter of the through hole 6, so the fitting part 11::
'', 10 is press-fitted, the periphery of the through hole 6 will be compressed, but only the part corresponding to the annular groove 14 will not receive any compressive force, so the flesh of this part will bulge and form an annular protrusion. is formed, and this protrusion is in a state where it bites into the annular groove 14.

In other words, the annular protrusion and the annular groove in the direction perpendicular to the 1111 center of the bolt 4 are engaged with each other, and the outer circumferential surface of the fitting part 1O and the inside of the through hole 6 are engaged with each other except for the engaging part of the bolt 4. Since the circumferential surface is in close contact with the surrounding surface under a constant internal pressure, the bolt 4, which is fixed at 1 in this way, is likely to loosen or break.
- Even if it loosens slightly, it will not come off easily due to the engagement between the groove and the protrusion.

As is clear from the above explanation, the effects of the present invention can be obtained up to the step shown in FIG. 4, and the steps up to this step are one embodiment of the present invention. By adding the bolt 4 to the axle hub 2, the bolt 4 can be more firmly fixed to the axle hub 2. That is, the 1tiJ recording and receiving device includes a hole 20 having an inner diameter that is much larger than the outer diameter of the fitting portion 10 and an annular projection formed on the periphery of the upper opening of the hole so as to protrude in the axial direction. 22, the bolt head 8 and the axle hub 2 are sandwiched between the bolt head 8 and the axle hub 2 with the pressing tool 18, and pressure is applied again (the impactful pressure is 11 tb). In this way, protrusion 2
2 applies concentrated IE shrinkage force to the peripheral edge of the N water passage 6, increases the contact pressure between the inner circumferential surface of the through hole 6 and the outer circumferential surface of the fitting part IO, and also reduces the protrusion formed in the MiJ process. 19 is further raised to further strengthen the engagement with the annular groove 14. Furthermore, since the portion that contacts the protrusion 220 is slightly depressed, there is also the effect of eliminating any bulges or burrs that have occurred around the exit of the through hole 6 during the press-fitting process.

FIG. 6 shows another embodiment of the invention. In this embodiment, the bolt 4 is the same as in the previous embodiment, but the axle hub 26 is different. That is, the through hole 28 of the axle hub 26
This embodiment differs from the previous embodiment in that a counterbore 30 is previously formed around the outlet side of the embodiment. If the bolt 4'f is press-fitted into the through hole 28 of the axle hub 26 using the receiver 1t-16 and the pressing tool 18 in the same manner as in the previous embodiment, the flesh around the through hole 28 will bite into the annular groove 14. The bolts 4 are firmly fixed to the axle hub 26, and in this case, the bulges and burrs that occur around the exit of the through hole 28 are accommodated in the seat 30, and are fixed to the axle hub 26 by the bolts 4. There is no interference with the plagidrum, etc. that should be used.

Additionally, in the following embodiments, the bolts 4 are press-fitted at room temperature, but the axle hub 2 or 26 may be heated in advance, the bolts 4 may be cooled, or both may be performed. If it is removed by 1E after this, the contact pressure between the inner circumferential surface of the through hole 6 or 28 and the outer circumferential surface of the fitting part IO will increase, and the penetration of the meat into the annular groove 14 will increase, further enhancing the effect of the present invention. noticeable.

Further, in order to prevent the bolt 4 from rotating within the water passage 6, it is also possible to form a protrusion long in the axial direction on the outer peripheral surface of the fitting part 10. However, if the number of these protrusions is large, the surface pressure between the bolt fitting part and the blood in the penetrating water will increase
In order to reduce the buildup of flesh on the 114, these protrusions are not provided on the entire outer peripheral surface of the fitting part as in conventional serration bolts, but only a relatively small number (10 or less) are provided at regular intervals. This is desirable.

The present invention can also be well applied to a coupling device as shown in FIG. This coupling device connects the bolt 36 to the
It is secured to a plate 38 in the same manner as in any of the embodiments shown, and a leaf spring snap 42 is fitted onto the bolt 36 to secure another plate 40 to the plate 38. As shown in FIG. 8, the leaf spring snap 42 includes a pair of claws 44.
is fixed by being engaged with the threaded portion of the bolt 86, and connects the plate 40 to the plate 88KL55i. In such a coupling device, since the bolt 36 is firmly fixed to the plate 38, there is no need to press the head of the bolt 36 when fitting the leaf spring snap 42, and the work can be easily performed even in narrow spaces. This will generate profits.

Furthermore, as shown in FIG. 9, it is possible to use a bolt having a plurality of annular grooves 14 in the fitting part IO, and the shaft-like object to be fixed is not limited to the bolt. bottle,
It does not matter if it is a shaft or the like, as long as the object to which these are to be fixed also has a plate-like part and the shaft-like object is fixed to that part. It goes without saying that the present invention may be further modified and improved in various ways based on the knowledge and knowledge of those skilled in the art without departing from the scope of the claims.

As is clear from the above description, when the present invention fixes a shaft-like object into a through hole formed in a plate-like object by press fitting,
At least one circumferential annular groove is formed on the outer peripheral surface of the fitting part of the shaft-like object.
By adding this extremely simple process, it is possible to prevent the shaft-like object from loosening, and even in the event of loosening, the shaft-like object will be removed and fall. This has an excellent effect of preventing the worst-case scenario from occurring.

[Brief explanation of drawings]

1 to 4 are diagrams showing one embodiment of the present invention,
1 and 2 are front views of an axle hub and bolts to be fixed to each other, respectively. Figure 3 is a front sectional view showing the state of the bolt holder iiJ, and Figure 4 is a front sectional view showing the state after press-fitting. FIG. 5 is a front sectional view showing a step added to the steps shown in FIGS. 1 to 4 to constitute another embodiment of the present invention. FIG. 6 is a front sectional view showing one step in another embodiment of the present invention. FIG. 7 is a front sectional view showing a state in which the plate is fixed by a leaf spring snap after the bolts are press-fitted, and FIG. 8 is a perspective view (2) of the leaf spring snap. FIG. 9 is a front view of a bolt used in another embodiment of the invention. 2.26: Axle hub (plate-shaped object) 4.82, 86: Bolt 6.28: Through hole lO: Fitting part 14: Annular groove 19: Protrusion 88.40 nibrate 42: Leaf spring snap 44:
Tsumeide 1 Tonjin Hosei Brake Industry Co., Ltd. Figure 6 Procedural Amendment Cap Button June 5, 1981 Director of the Patent Office Kazuo Wakasugi 1, Indication of the Case 1988 Patent Application No. 90339 2, Title of the Invention Method of fixing a shaft-like object to a plate-like object 3, relationship with the case of the person making the amendment Patent applicant name Hosei Brake Industry Co., Ltd. 4, agent■
450 Column 6 of the detailed explanation of the invention in the specification, supplementary iE inner culm 0) Specification weekly wage 70 14th ft to i 2nd () line i 1
4 (-This protrusion... is desirable.1 to 1 (1
1L If the quotient of this protrusion is good, the blood pressure between the bolt fitting part 10 and the inner surface of the through hole 6 will be lowered, and the amount of meat built up inside the annular talU will be reduced. It will be done. Therefore, in order to ensure that the meat within the annular shape 414 is thick, the size of the protrusions (mountains) must be appropriately controlled and controlled.
The fitting portion 10L may be removed from the fitting portion 10L, or the curved protrusion may be placed in the conventional lane 1-. 1. The outer periphery of the sea urchin fitting part...1 It is preferable to provide only a relatively small number (10 or more [-)] at a certain interval, rather than providing them on the upper body. ” to 11 sleeves. (2) [Further bolt removal,
-il",." and 1 as shown in FIG. 9, one annular groove 14 is provided in the vicinity of the fourth part 8 of the 1 fitting part lO),
” is inserted. -L

Claims (1)

[Claims] A step of forming a circular through hole in a metal plate-like object, and a fitting having a diameter larger than that of the through hole that is to be fitted into I) the through hole of the metal shaft-like object. At least one circumferential annular groove is provided at the joint.
A plate-shaped object characterized by comprising the steps of: forming the main part; and press-fitting the fitting part into the through-hole so that the peripheral edge of the through-hole bites into the annular groove. How to fix shaft-like objects.